<?php

namespace Qiniu\Storage;

use Qiniu\Config;
use Qiniu\Http\HttpClient;
use Qiniu\Storage\ResumeUploader;
use Qiniu\Storage\FormUploader;

/**
 * 主要涉及了资源上传接口的实现
 *
 * @link http://developer.qiniu.com/docs/v6/api/reference/up/
 */
final class UploadManager
{
    private $config;

    public function __construct(Config $config = null)
    {
        if ($config === null) {
            $config = new Config();
        }
        $this->config = $config;
    }

    /**
     * 上传二进制流到七牛
     *
     * @param string   $upToken  上传凭证
     * @param string   $key      上传文件名
     * @param resource $data     上传二进制流
     * @param array    $params   自定义变量，规格参考 http://developer.qiniu.com/docs/v6/api/overview/up/response/vars.html#xvar
     * @param string   $mime     上传数据的mimeType
     * @param bool     $checkCrc 是否校验crc32
     *
     * @return array    包含已上传文件的信息，类似：
     *                                              [
     *                                                  "hash" => "<Hash string>",
     *                                                  "key" => "<Key string>"
     *                                              ]
     */
    public function put($upToken, $key, $data, $params = null, $mime = 'application/octet-stream', $fname = "default_filename")
    {
        $params = self::trimParams($params);
        return FormUploader::put($upToken, $key, $data, $this->config, $params, $mime, $fname);
    }


    /**
     * 上传文件到七牛
     *
     * @param string $upToken  上传凭证
     * @param string $key      上传文件名
     * @param string $filePath 上传文件的路径
     * @param array  $params   自定义变量，规格参考 http://developer.qiniu.com/docs/v6/api/overview/up/response/vars.html#xvar
     * @param string $mime     上传数据的mimeType
     * @param bool   $checkCrc 是否校验crc32
     *
     * @return array    包含已上传文件的信息，类似：
     *                                              [
     *                                                  "hash" => "<Hash string>",
     *                                                  "key" => "<Key string>"
     *                                              ]
     */
    public function putFile($upToken, $key, $filePath, $params = null, $mime = 'application/octet-stream', $checkCrc = false)
    {
        $file = fopen($filePath, 'rb');
        if ($file === false) {
            throw new \Exception("file can not open", 1);
        }
        $params = self::trimParams($params);
        $stat = fstat($file);
        $size = $stat['size'];
        //不满足分片上传条件
        if ($size <= Config::BLOCK_SIZE) {
            $data = fread($file, $size);
            fclose($file);
            if ($data === false) {
                throw new \Exception("file can not read", 1);
            }
            return FormUploader::put($upToken, $key, $data, $this->config, $params, $mime, basename($filePath));
        } else {
            $up = new ResumeUploader($upToken, $key, $file, $size, $params, $mime, $this->config);
            $ret = $up->upload(basename($filePath));
            fclose($file);
            return $ret;
        }
    }

    public static function trimParams($params)
    {
        if ($params === null) {
            return null;
        }
        $ret = array();
        foreach ($params as $k => $v) {
            $pos1 = strpos($k, 'x:');
            $pos2 = strpos($k, 'x-qn-meta-');
            if (($pos1 === 0 || $pos2 === 0) && !empty($v)) {
                $ret[$k] = $v;
            }
        }
        return $ret;
    }
}
